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RE: Filters

  • From: "Willem-Jan Markerink" <w.j.markerink@xxxxx>
  • Subject: RE: Filters
  • Date: Fri, 17 Apr 1998 21:56:26 +0000
On 17 Apr 98 at 9:07, Jason Revell (in5) wrote:

> The difference between the Hoya yellow and a Kodak #12 is very
> noticeable, certainly when compared side by side.
> I have also found that the Hoya filter allows about 1 stop more
> light through so I expose in our studio at about 400 asa as opposed
> to 250asa for the #12 filter (not metered through the filter).  I am
> still
> waiting for the B+W colour IR filter the arrive.  Has anyone here used
> it?

It's the same as the #12 Wratten....I think B+W even complicates 
things by having two different numbers for one and the same filter, 
one ordinary medium yellow, one for color IR. Check my homepage for 
technical details.
 
 

- -- 
Bye,

Willem-Jan Markerink


      The desire to understand 
is sometimes far less intelligent than
     the inability to understand


<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]
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